Pascal-(1,9,1) array.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =11a(5) =1a(6) =1a(7) =21a(8) =21a(9) =1a(10) =1a(11) =31a(12) =141a(13) =31a(14) =1a(15) =1a(16) =41a(17) =361a(18) =361a(19) =41a(20) =1a(21) =1a(22) =51a(23) =681a(24) =1991a(25) =681a(26) =51a(27) =1a(28) =1a(29) =61